What puzzles me most is that I have given up with the PIN for the moment and re-instated the SecurityID - when I activated this, I was sent a confirmation SMS, which did arrive almost instantly, and when I log onto Paypal, again it sends me the security check SMS every time, so I can't see how it can be t-mobile, it has to be that Paypal aren't sending the SMS, or it's being blocked at their end.
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I'm having the same problem - my carrier is t-mobile, and my phone is only linked to a single account (though it was listed twice for some reason, with the second unlinked, so have removed that one) I had the security key already set up (this meant that whenever I logged into paypal to make a payment etc, I was sent a text with a 6 digit code to enter on the website, to authenticate that it was genuinely me) - this caused me a problem logging onto paypal on my phone as it wanted my security key phone as part of the password and failed every time to log in. Contacted paypal who said that the security key needed to be removed, which they did, so I could then log in using my usename and password, Tried setting up the PIN again, repeatedly, both online and via my smartphone. Each time I received a confirmation email stating that my PIN had been changed, but no SMS message. On Paypal's advice, contacted t-mobile, who said that my account was barred from receiving marketing texts, so they removed this barr. Tried again to set up PIN, got the confirmation emails, but still no SMS messages, so I'm still no closer. Unless I can get this working with a PIN, I won't use paypal from my phone as logging in with the password is a nuisance. Would be nice to have a solution to this.
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